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   sci.space.tech      Technical and general issues related to      3,113 messages   

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   Message 2,668 of 3,113   
   Michael Smith to Ian Stirling   
   Re: Black-hole powered thruster?   
   22 Mar 05 08:30:30   
   
   From: smithm@SPAMBLOCKnetapps.com.au.retro.com   
      
   On 21 Mar 2005 23:16:13 GMT   
   Ian Stirling  wrote:   
      
   > No.   
   > A small black hole evaporates too fast to be of use.   
   > As an example, if I recall correctly, a 600 ton mass black hole   
   > evaporates totally in 1 second.   
   >   
   > Another way of saying this is that to create a 600 ton black hole, you   
   > have to put in several orders of magnitude more energy than this, in 1   
   > second.   
      
   You can feed the mass/energy into the black hole in the form of mass,   
   assuming that you can push it against the flow of mass/energy from the   
   evaporating black hole. The advantage of feeding mass in is that it has   
   a higher density and is easier to manipulate in large quantities.   
      
   Once you have got it stable you can feed matter in slowly and use the   
   resulting radiation as a power source.   
   --   
   Michael Smith   
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